Exclusive: Sandy Hook victim's daughter confronts Sen. Ayotte

In an exclusive interview, Erica Lafferty, daughter of the late Sandy Hook Elementary School principal, Dawn Hochsprung, tells MSNBC's Lawrence O'Donnell why she will make her voice heard to lawmakers.

The Syllabus: What you should know for the May 5 ‘MHP’

At the end of this week, President Obama took a trip to Mexico to discuss ways to secure the border with Mexican president Enrique Peña Nieto in an effort to push his immigration plan back home. One thing the president did not spend much time addressing was the increasingly volatile war on drugs. In the past four months alone, more than 4,000 people have been killed in drug related violence. While the president may not have been talking about drugs, on Thursday, Maryland partially legalized the medical use of marijuana. On Sunday’s show, Melissa Harris-Perry will discuss the national conversation we need to have about how the decades old war on drugs has really been a war on people and the need to reshape America’s drug policies.

We’ll also explore a lesser known war this country is fighting, the war on the homeless. This past April, the ACLU sent a letter to the Department of Justice and the Detroit police department, informing them that a year-long investigation uncovered practices of officers picking up and “dumping” homeless individuals outside the city lines.

In addition, Sunday’s show will talk about the politics of public shaming, how it’s used, who uses it, and how effective it can be. Harris-Perry will specifically highlight Erica Lafferty’s one-woman mission to shame the senators who voted against the background check bill–a bill that could have conceivably saved the life of her mother, Sandy Hook Elementary principal Dawn Hochsprung. (See above msnbc host Lawrence O’Donnell’s interview with Lafferty from earlier this week.)